Creasing directly affects how a carton looks and folds. If the channel is wrong, the fold may crack, the flap may not sit correctly or the box may lose its shape.
Gsm and thickness are not identical
Board gsm is useful, but it does not fully define folding behavior. Different boards with the same gsm can vary in thickness and grain response.
- Share thickness as well as gsm.
- Mention lamination or varnish.
- A material sample is the safest reference.
Grain direction changes folding
Folds parallel and perpendicular to the grain behave differently. Wrong creasing can make small flaps hard to close.
- Mark critical flap dimensions.
- Make fold direction clear in the drawing.
- Note cracking risk on heavily printed areas.
Channel width affects tolerance
A crease channel that is too narrow or too wide can create cracking, bulging or loose folding. This should be reviewed before production.
- Match channel choice to board thickness.
- Mark critical bends.
- Mention proofing needs early.
How to describe creasing for a quote
Sending only the outer cut line is often not enough for carton jobs. Cut, crease and perforation lines should be separated clearly.
- Use different colors for crease lines.
- Dimension folding points.
- Check locking-flap areas carefully.
Quick pre-quote check
When these details are clear, quoting and production discussion moves faster on WhatsApp.
- Is the file the final revision?
- Are material and quantity written?
- Are cut, crease and perforation separated?
- Is the deadline clear?